Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f4206784a652056…

MALICIOUS

PDF

91.7 KB Created: 2021-06-10 16:56:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45a0c3f606a9e74d95a197e493c7309f SHA-1: fdce5f04198a20c0e836275329aac41148d30ec9 SHA-256: 6f4206784a652056a3adfaeec8a20860d41013358921d79605ab0d072cf81ad2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external URIs and embedded links, many pointing to compromised WordPress sites, suggesting a link farm or SEO manipulation tactic. The document body contains garbled text and metadata, but the presence of numerous suspicious URLs indicates an attempt to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://garglob.ru/uplcv?utm_term=yeh+rishta+kya+kehlata+hai+all+songs+lyrics+mehndi
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/34a55f399b6bdca5e2f3833e32792472/gojolitepamuni.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0b02a2c8b---bebifuledolotalotil.pdf
    • https://karapinarinsaat.net/userfiles/upload/file/ladiruroxobur.pdf
    • https://gadd-asso.org/userfiles/file/robalodugagijeworufovid.pdf
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f334514d8b---82474771273.pdf
    • https://alamansyria.com/userfiles/file/besatefebawulo.pdf
    • http://grawerlik.pl/userfiles/file/94301136157.pdf
    • http://tecsun-moscow.ru/docs/file/nojak.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1607272db4414f---vafar.pdf
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/3b59529054f51d1bd0edd1e6f00cb437/futibotagetixures.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/e1c65d925c6d2aef08b2e383c40c46d7/3991800810.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160a381be76fc8---55453588541.pdf
    • http://saharun.org/uploads/ckfinder/userfiles/files/6671330961.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/p6ogrf8q7a7fuc6to047h66eg9/riberunoxegixogoxemuxiwu.pdf
    • https://uleshuzataruhaz.hu/files/file/mufakaxuxikuzap.pdf
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/e51f24984c915c199701bac35305e9ea/4161533537.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c0fa21a85c9---gewalaxosadozoxokijif.pdf
    • http://fedorahosted.org/lohit
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0001427e.bin
5ec7846b04677a0e349ad009d4f2dd6ec10d1d91a67777fd6d43d9d527e84443		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1427E 8436 bytes
font_00_sfnt_off0000ec8c.bin
dcd560c1e26c0975559a5b1f3438ea36f7d134ee5f59c790e00ffaaf4fe6d6c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8C 5480 bytes
font_01_sfnt_off0000ff06.bin
0bb2955b5ca913a863097ea77f419106b897578fd6324294087ea51a982d7a63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF06 1872 bytes
font_02_sfnt_off000107f6.bin
86f309d16c7666977f3f1a4f6f8bf282d30eae394e9a8bb743b39dbdb92e79b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107F6 11016 bytes
font_03_sfnt_off00012ddb.bin
bc1c1644e30597ae0beaac312b9749a82b64e26c109397326cdc67fdbaf2fe17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DDB 16036 bytes

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